\"\"

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The expression is \"\".

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Apply product of a power property: \"\".

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\"\"

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\"\"                              (LCM of 1, 3 is 3)

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\"\"                                (Multiply: \"\")

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\"\"                                    (Add: 15 + 2 = 17)\"\"

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Apply quotient of a power property: \"\".

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\"\"

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\"\"

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\"\"

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For any real number b and for any positive integer n, \"\".

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\"\"

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\"\"

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The option C is right choice.